Search keywords in database to support some basic functions like exact word matching, ignoring words, etc.

[FancyBEAST]

In what scenarios do you need this feature?

When searching for keyword "format" in the database the results show all rows that has the word "format" but it also shows rows with "information" as keyword. Some form of control like using quotations to only match that word would be helpful

Describe the optimal solution

Implementing the default search of siyuan which in my opinion is the best with SQL, Regex, Query Syntax etc. (Thank you for making such an amazing app)

Describe the candidate solution

Implementing simple functions like exact word matching, ignoring certain words etc to the database search

Other information

All other search functions like backlink filter, mentions filter, tag filter in future (#11039) , etc. can also enjoy benefits from the above